Select CONVERT(varchar(100), GETDATE(), 21): 2006-05-16 10:57:47.157 Select CONVERT(varchar(100), GETDATE(), 22): 05/16/06 10:57:47 AM Select CONVERT(varchar(100), GETDATE(), 23): 2006-05-16 Select CONVERT(varchar(100), GETDATE(), 24): 10:57:47 Select CONVERT(varchar(100...
PostgreSQL allows us to convert a date, interval, number, timestamp, etc., to a string via theTO_CHAR()function. The TO_CHAR() function utilizes a format mask to convert the input value to a string. The format mask must be a valid number or date. This write-up will teach you how ...
说明:Convert string to dest_encoding. The original encoding is specified by src_encoding. The string must be valid in this encoding. Conversions can be defined by CREATE CONVERSION. Also there are some predefined conversions. See Table 9-7 for available conversions. 转换字符串编码,指定源编码与目...
convert(string using conversion_name) text 使用指定的转换名字改变编码。 convert(‘PostgreSQL’ using iso_8859_1_to_utf8) ‘PostgreSQL’ lower(string) text 把字串转化为小写 lower(‘TOM’) tom octet_length(string) int 字串中的字节数 octet_length(‘jose’) 4 overlay(string placing string from...
convert(string using conversion_name)text使⽤指定的转换名字改变编码。convert('PostgreSQL' using iso_8859_1_to_utf8)'PostgreSQL'lower(string)text把字串转化为⼩写lower('TOM')tom octet_length(string)int字串中的字节数octet_length('jose')4 overlay(string placing string from int [for int])text...
pg_catalog | convert | bytea | bytea, name, name | normal pg_catalog | convert_from | text | bytea, name | normal pg_catalog | convert_to | bytea | text, name | normal 如果8.x需要避免显示问题,返回字节流,可以这样使用,推荐使用。
convert('PostgreSQL' using iso_8859_1_to_utf8) 22、9;PostgreSQL'lower(string)text把字串转化为小写lower('TOM')tomoctet_length(string)int字串中的字节数octet_length('jose')4overlay(string placing string from int for int)text替换子字串overlay('Txxxxas' placing 'hom' from 2 for 4)Thomas...
...在Python中将字符串转换为整数的错误方法 (The Wrong Way to Convert a String to an Integer in Python) Programmers coming...在这里, TypeError: must be str, not int ,该整数必须先转换为字符串才能连接。 ...在Python中将字符串转换为整数的正确方法 (The Correct Way to Convert a String to an...
to_char(int, text)text 把整数转换成字串 to_char(125, '999')to_char(double precision, text)text 把实数/双精度数转换成字串 to_char(125.8::real, '999D9')to_char(numeric, text)text 把numeric转换成字串 to_char(-125.8, '999D99S')to_date(text, text)date 把字串转换成日期 to_date...
* * BYTEA convert(BYTEA string, NAME src_encoding_name, NAME dest_encoding_name) */ Datum pg_convert(PG_FUNCTION_ARGS) { bytea *string = PG_GETARG_BYTEA_PP(0); char *src_encoding_name = NameStr(*PG_GETARG_NAME(1)); int src_encoding = pg_char_to_encoding(src_encoding_name);...